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(No Model.) 2 Sheets-Sheet L E. WESTON DYNAMO ELECTRIC MAGHINE.

No. 269,761. Patented De0.26,1 882.

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(No Model.) 2 Sheets-Sheet 2.

E. WESTON.

DYNAMO ELECTRIC MACHINE. No. 269,761. PatentedDeo.26,188 2.

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V UNIT D STATES PATENT OFFICE.

EDWARD WESTON, ()F NEW'ARK, NEW JERSEY, ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF NEW YORK, N. Y.

DYNAMO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 269,761, dated December I Application filed September 13, 1882. (No model.)

To all whom it may concern Be it known that I, EDWARD WEs'roN, a subject of the Queen of Great Britain, and resident of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Dynamo- Electric Machines, of which the following is a specification, reference being bad to the drawings accompanying and forming a part of the same.

In another application'filed by me I have described certain improvements in the construction of magneto or dynamo electric machines, the said improvements relating more particularly to the form of the frame and the mode of mounting the armature therein, and consisting in the combination, with the fieldmaguets or their pole-pieces, of solid projections supporting the bearings of the armature- 2o shaft. My present invention involves the application of this invention, under conditions hereinafterspecified, to a frame that possesses certain advantages over that described in my application referred to. The nature and pur- 2 pose of the improvements will be hereinafter set forth.

In the drawings, Figure 1 is a view in side elevation of a machine embodying myimprovements; Fig. 2, an end view of Fig. 1, with slight modifications.

Similar letters of reference indicate corresponding parts. 1

The general construction ofthe machine illustrated is as follows: Upper and lower fieldmagnet cores, A and B, are bolted to standards or side supports, 0, anti the latter are firmly bolted to a substantial base, D. The fieldmagnet cores A and L are wound with four coils, the direction of winding being such that the parts aand 1) form consequent poles of unlike polarity. Between the pole-pieces is mounted a cylindrical armature, E, on a shaft, F, which carries also a commutator, G, and a pulley, H. The specific character of these 5 parts may, however, be considerably varied withoutdeparturc from my present invention. For an understanding of the nature of the armature, and the plan of winding and connecting the same, reference is made to my former patents, No. 209,532, No. 259,618, and others. The lower magnet or core, B, is cast with a projecting arm, K, which should be comparatively heavy for greater strength and stability. Theopposite faces of the lower and upper pole piecesare formed nearly square, or with slight grooves or ridges, and upon them is bolted a cap or brace, L, of brass or other non-magnetic metal, which affords a bearing for the armature-shatt close to the pulley H. The cap or brace L may be cast in one or two parts. It has strengthening-ribs l l and flanges c, by means of which it is bolted to the upper and lower poles. For large machines the caps L are required to be very strong and immovable, and to avoid the employment of a very large mass of metal stout braces or tie-rods N N, passing through lugs n n on the standards 0 and secured to the cap L, are employed. These braces may be four in number; or a greater or less number may be used. In Fig. 1 two only are employed, and usually this will be found sufficient. In very large machines, however, where the space between the two polepieces of the fiel-dmagnets and the distance between the faces of the poles and bearings of the shaft are necessarily great, four braces will be found to give the best results. To the end of the arm or projection K is bolted a casting,

P, constituting a bearing for the commutator end of the shaft. The arm K is of such a length that this hearing will be beyond the commutator, or, in other words, so that the commutator lies inside the bearing. This construction is preferred, although the end of the arm K might itself be bored out to form a hearing for the shaft.

By theabove-described mode of construction great stability is attained in even the largest machines. Thctruingofthebearingsisgreatly facilitated, all vibration or displacement by the pull of the driving-belt efi'ectually prevented, and the armature exposed suificiently for ready inspection or removal and for ati'ording an increased circnlatlon of air.

Though a cotnplete machine embodying features of novelty other than those set forth is shown, such features are not specifically described herein, but will be made the subjectmatterof other applications for Letters Patent.

Having now described my invention,- what I claim as new, and desire to secure by Letters Patent, is-- 1. The combination, in a dynamo-electric machine, with the upper and lower field-magnet cores, of asolid arm or projection extending from the lower core and affording a bearing for the armature-shaftoutside the commutator, substantially as set forth.

2. In a dynamo-electric machine, the combination, with field'magnetcores substantially such as described, of a solid arm or projection extending from the lower pole-piece and affording a bearing for the commutator end of the shaft, and a non-magnetic cap or equivalent hOitJ'd to the faces of both pole-pieces and affording a bearing for the pulley end of the shaft, as and for the purpose set forth.

3. lhe combination, with the field-magnets of a dynamo-electric machine substantially such as herein described, of a non-magnetic E DXVA RD \VESTON.

Witnesses:

W. FRISBY, PARKER W. PAGE. 

